Circular Slide Ruler

Does exactly what I need it for. The only additional features that would be interesting would be zoom and set outer ring to a certain value (e.g. O=3.14159, etc.) but that defeats the purpose of a slide rule. This is on the home screen!

What scale is this supposed to be? If it's multiplication there is a problem, because the outer and inner don't line up correctly (ex. 10*20 gives 500, not 200). Also, why start at 10 instead of one as on most physical slide rules (obviously it's just decimal shifting but why bother)?

@Dev: a color combo choice customization would be nice. i want black inner ring + white outer ring, kinda like the breitling navitimer!

Excelent calculator, near instant results. I like how intuitive it is. Needs an auto-reset button to set the dial back to zero. Other than that, it's really simple, but awesome.

Simple design that does exactly what it claims to do. I would love to see more scales, a cursor, and a digital readout.

A no frills circular slide rule.

Would like to see more like conversions.

Great app! So simple and clean.

BEST APP AMOMG THE OTHERS

Does exactly what I need it for. The only additional features that would be interesting would be zoom and set outer ring to a certain value (e.g. O=3.14159, etc.) but that defeats the purpose of a slide rule. This is on the home screen!

Control of rotation is great. The speed or sensitivity of the movement changes intuitively depending on your finger placement. (Closer to the center faster. To the edges of the screen, slower movement.) If it had other scales such as one for roots, I would give it 5 stars.

I'm the limiting factor with this app. My touch accuracy isn't good so it takes me a while to set it like I want. I'm getting better because of this app. Calculations by self getting better also. Great for when speed and accuracy is needed during multi-tasking.

How to use this thing? The fact that creators of this app know it does not mean that everyone else was born with this knowledge.

A simple device and easy to use.College days in the 60s these were every where,no calculators then.I even impressed my grand children.

Great little app. Quick, easy to use, nice scale colors in both light and dark themes. Excellent work!

Easy to use app. Should consider making this for android wearable's for when flying and need to do a quick conversion. Also would be great if we could set the inner slide so that 60 was at the top a well as hours on the inner slide for minutes to hours conversion.

Quick, fun, and easy to use. Just a couple more features would make it a real winner: disabling the phone's gyro so you aren't forced to read the bottom of the scale upside down, and adding a positionable needle (cursor) so you could judge results more accurately.

I have a watch with a rotary slide rule, but, alas with having long vision, I'm finding it harder to read! This app, however, is clearer to see and use. Tips for improvement could be: Use of red for 10 (as on my watch). Larger circle, OR zoom facility. Other than that, excellent.

Works precisely as it should. Well done.

Does what you would expect. Circular slide rule for multiplication and division. Inner wheel is fixed. You turn the outer wheel. Two digit precision. Use for quick unit conversion (miles/km, pounds/kg), currency conversion, price discounts, DSLR focal length crop ratio. Remembers the ruler position even if you restart your phone. Search youtube for aviation watch converting currency, for a tutorial.

Quick, fun, and easy to use. Just a couple more features would make it a real winner: disabling the phone's gyro so you aren't forced to read the bottom of the scale upside down, and adding a positionable needle (cursor) so you could judge results more accurately.

I have a watch with a rotary slide rule, but, alas with having long vision, I'm finding it harder to read! This app, however, is clearer to see and use. Tips for improvement could be: Use of red for 10 (as on my watch). Larger circle, OR zoom facility. Other than that, excellent.

Works precisely as it should. Well done.

Does what you would expect. Circular slide rule for multiplication and division. Inner wheel is fixed. You turn the outer wheel. Two digit precision. Use for quick unit conversion (miles/km, pounds/kg), currency conversion, price discounts, DSLR focal length crop ratio. Remembers the ruler position even if you restart your phone. Search youtube for aviation watch converting currency, for a tutorial.